The contention is "math has only one truth, it's not subjective!", but we are talking about human conventions and notations here, not the abstract nature of the concept of mathematical relations.
In the real world, outside a given classroom that teaches one way, professional mathematicians do not even agree of whether the natural numbers include the number zero not.
Smart people who want to communicate ideas will say "non-negative integers" or "positive integers" to be clear, rather than going on the barricades for the supremacy of a given interpretation. And professional mathematicians just do not write x/yz in their paper. Except when they do.
In brief: What people learned about PEMDAS in primary school and highschool is an oversimplification of how actual mathematicians and math users write math in scientific papers.
Every year for the last 13 years, some post makes the rounds complaining that calculators disagree on what an expression like 8/2(2+2) or 6Γ·2(1+2) means.
And every time some loud people show up saying people are idiots if they don't know there's One Correct Answer, and if you know Math you know the Answer.
Here's science educator "The How and Why of Mathematics" with full receipts from papers around 1917 and full receipts from maths and physics publishing guidelines of today explaining that it's Just Not That Clear.
It seems the people who think it is are mostly people who went to US primary school and highschool and learned the PEMDAS initialism in the 1990s or later.
She even goes through various calculator brands and what their representatives have said! Basically only Sharp calculators are consistent within their product lines, others have moved back and forth over time.
@Jason_Dodd If you like robots and mass murder plots I can highly recommend Murder Drones. It's a bit high on itself and tries to be mysterious and deep, but it's also quite fun and exciting.
The fan base is beyond delightful from what I've seen, warm and creative people.
I need to go back and check the shelf label. I think the sign just said "baked potato with egg and dressing". It's from a bakery, so I suppose the bread is implied. π€·
"Tremors 3: Back to Perfection is a 2001 comedic monster film, the third in the "Tremors" series featuring the subterranean worm-creatures dubbed "Graboids". It was directed by Brent Maddock and stars Michael Gross. Like the second movie, the film was not released in theaters. It introduced a new creature called the Ass-Blasters. "
Aargh, trying to find a blog post from 10β20 years ago where the title goes something like "You can never tell anyone anything" or "People can't be told anything" about how difficult it is to communicate truly new ideas to people unless they've encountered the same issues you have and already sort of agree with you and you're just providing the last piece of the puzzle.
Could be Joel Spolsky, could be someone compleletely different.